TEXAS CLASS D WATER LICENSE(COMPLETE)QUESTIONS AND ANSWERS.
What removes tastes, odors, and certain organics and gases, and oxidizes iron and manganese?
This process includes the incorporation of air into the water by means of spray nozzles , steps or
cascades, or trays of diffusers? - (ANSWER)Aeration
TCEQ regulation states that Shore installations , marinas, boats and houses on the watershed
must have sewage? - (ANSWER)disposal
Water aerated or chlorinated at proper pH levels oxidizes the iron and manganese, turning them
into solid? - (ANSWER)particles
Well casing and cementing protect the well from collapse and surface ? -
(ANSWER)contamination
Sequestering does not remove iron#$%^&*()_+
from the water, but prevents it from combining with oxygen
and? - (ANSWER)reddening
The quantity of water a formation yields depends on the formations thickness and? -
(ANSWER)permeability
Cascade aerators, packed air-stripping towers, and air diffusers are used to aerate? -
(ANSWER)water
Aeration can be used to remove what from the water supply? - (ANSWER)iron and manganese
Hydrogen sulfide has a rotten egg odor and is oxidized by? - (ANSWER)super-chlorination
When Iron levels get this high, it can cause red stains on clothing, colored water, or turbidity? -
(ANSWER)0.3 mg/L
Excess Manganese can cause? - (ANSWER)black stains
Another method of iron control is the use of? - (ANSWER)sequestering agents
What is a sequestering agent? - (ANSWER)polyphosphates
Well water is sometimes? - (ANSWER)corrosive
Low ph, dissolved gases, high temperatures, and high mineral levels can cause well water to be?
- (ANSWER)corrosive
, TEXAS CLASS D WATER LICENSE(COMPLETE)QUESTIONS AND ANSWERS.
What is the process of removing calcium and magnesium by adding lime or by exchanging ions?
- (ANSWER)softening
An ion exchange replaces calcium ions with? - (ANSWER)sodium ions
A process available for removing arsenic, fluoride, lead, mercury, nitrate, and silver from raw
water is? - (ANSWER)coagulation followed by sedimentation and filtration
A process that forces water through a membrane is? - (ANSWER)reverse osmosis
In reverse osmosis a sheet of synthetic material (membrane) under pressure prevents passage of
dissolved materials and larger particles and ejects them in a? - (ANSWER)waste stream
The Surface Water Treatment Rule#$%^&*()_+
(SWTR) requires community and non-community wells,
springs, and infiltration galleries ( a subsurface tunnel that collects groundwater) to determine
possible direct influence of? - (ANSWER)surface water
Changes in groundwater quality can indicate influence of surface water organisms such as
giardia cysts, algae or other? - (ANSWER)microorganisms
If well is deeper than 50 feet and more than 200 feet from a nearby surface water body, extensive
evaluation of the influence of surface water on a water supply is? - (ANSWER)not required
Surface water evaluations are needed on a water supply when shifts in water quality occur such
as turbidity, temperature, pH, and the presence of? - (ANSWER)surface water organisms
What are underground, water-bearing formations yielding useful quantities of water? -
(ANSWER)Aquifiers
Problems caused by what are declining water levels and subsidence (sinking of land)? -
(ANSWER)overpumping
The purpose of the well screen is to keep out birds and? - (ANSWER)sand
the most important feature of the well screen is the size of the? - (ANSWER)opening
The mesh size of the screen is determined by the size of the aquifer material, the size of the
gravel in the gravel pack, and the type of well ? - (ANSWER)development
The gravel pack is fine gravel placed around the screen to reduce pumping? - (ANSWER)sand
What removes tastes, odors, and certain organics and gases, and oxidizes iron and manganese?
This process includes the incorporation of air into the water by means of spray nozzles , steps or
cascades, or trays of diffusers? - (ANSWER)Aeration
TCEQ regulation states that Shore installations , marinas, boats and houses on the watershed
must have sewage? - (ANSWER)disposal
Water aerated or chlorinated at proper pH levels oxidizes the iron and manganese, turning them
into solid? - (ANSWER)particles
Well casing and cementing protect the well from collapse and surface ? -
(ANSWER)contamination
Sequestering does not remove iron#$%^&*()_+
from the water, but prevents it from combining with oxygen
and? - (ANSWER)reddening
The quantity of water a formation yields depends on the formations thickness and? -
(ANSWER)permeability
Cascade aerators, packed air-stripping towers, and air diffusers are used to aerate? -
(ANSWER)water
Aeration can be used to remove what from the water supply? - (ANSWER)iron and manganese
Hydrogen sulfide has a rotten egg odor and is oxidized by? - (ANSWER)super-chlorination
When Iron levels get this high, it can cause red stains on clothing, colored water, or turbidity? -
(ANSWER)0.3 mg/L
Excess Manganese can cause? - (ANSWER)black stains
Another method of iron control is the use of? - (ANSWER)sequestering agents
What is a sequestering agent? - (ANSWER)polyphosphates
Well water is sometimes? - (ANSWER)corrosive
Low ph, dissolved gases, high temperatures, and high mineral levels can cause well water to be?
- (ANSWER)corrosive
, TEXAS CLASS D WATER LICENSE(COMPLETE)QUESTIONS AND ANSWERS.
What is the process of removing calcium and magnesium by adding lime or by exchanging ions?
- (ANSWER)softening
An ion exchange replaces calcium ions with? - (ANSWER)sodium ions
A process available for removing arsenic, fluoride, lead, mercury, nitrate, and silver from raw
water is? - (ANSWER)coagulation followed by sedimentation and filtration
A process that forces water through a membrane is? - (ANSWER)reverse osmosis
In reverse osmosis a sheet of synthetic material (membrane) under pressure prevents passage of
dissolved materials and larger particles and ejects them in a? - (ANSWER)waste stream
The Surface Water Treatment Rule#$%^&*()_+
(SWTR) requires community and non-community wells,
springs, and infiltration galleries ( a subsurface tunnel that collects groundwater) to determine
possible direct influence of? - (ANSWER)surface water
Changes in groundwater quality can indicate influence of surface water organisms such as
giardia cysts, algae or other? - (ANSWER)microorganisms
If well is deeper than 50 feet and more than 200 feet from a nearby surface water body, extensive
evaluation of the influence of surface water on a water supply is? - (ANSWER)not required
Surface water evaluations are needed on a water supply when shifts in water quality occur such
as turbidity, temperature, pH, and the presence of? - (ANSWER)surface water organisms
What are underground, water-bearing formations yielding useful quantities of water? -
(ANSWER)Aquifiers
Problems caused by what are declining water levels and subsidence (sinking of land)? -
(ANSWER)overpumping
The purpose of the well screen is to keep out birds and? - (ANSWER)sand
the most important feature of the well screen is the size of the? - (ANSWER)opening
The mesh size of the screen is determined by the size of the aquifer material, the size of the
gravel in the gravel pack, and the type of well ? - (ANSWER)development
The gravel pack is fine gravel placed around the screen to reduce pumping? - (ANSWER)sand
